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To J. H. Gilbert   5 February 1881

Summary

Asks whether vegetable mould has an acid reaction. The contents of intestines of earthworms and castings are acid, which leads him to inquire about mould.

Author:  Charles Robert Darwin
Addressee:  Joseph Henry Gilbert
Date:  5 Feb 1881
Classmark:  Rothamsted Research (GIL13)
Letter no:  DCP-LETT-13038

To J. H. Gilbert   25 February 1881

Summary

Discusses acidity of earthworm castings. JHG’s reply will make him more cautious.

Would like to see W. A. Detmer’s paper [Landwirtsch. Versuchs-Stat. 14 (1871): 248–300] and S. W. Johnson’s work [How crops feed].

Comments on food value of white and brown bread.

Author:  Charles Robert Darwin
Addressee:  Joseph Henry Gilbert
Date:  25 Feb 1881
Classmark:  Rothamsted Research (GIL13)
Letter no:  DCP-LETT-13066

To J. H. Gilbert   15 March 1881

Summary

Returns the two books JHG had lent him. "I can plainly see I had better say nothing about the acidity of common mould."

Author:  Charles Robert Darwin
Addressee:  Joseph Henry Gilbert
Date:  15 Mar 1881
Classmark:  Rothamsted Research
Letter no:  DCP-LETT-13087

To J. H. Gilbert   8 June 1881

Summary

Regrets that he has not strength enough to visit [Rothamsted].

Author:  Charles Robert Darwin
Addressee:  Joseph Henry Gilbert
Date:  8 June 1881
Classmark:  Rothamsted Research (GIL13)
Letter no:  DCP-LETT-13198

From J. H. Gilbert   22 February 1881

Summary

The laboratory has scarcely any experimental evidence on acidity of humus soil and earthworm excreta. Refers CD to some sources of information.

Author:  Joseph Henry Gilbert
Addressee:  Charles Robert Darwin
Date:  22 Feb 1881
Classmark:  DAR 165: 43
Letter no:  DCP-LETT-13063

From J. H. Gilbert   7 March 1881

Summary

Sends some books.

Author:  Joseph Henry Gilbert
Addressee:  Charles Robert Darwin
Date:  7 Mar 1881
Classmark:  Rothamsted Research (GIL13)
Letter no:  DCP-LETT-13076F

From J. H. Gilbert   5 June 1881

Summary

Invites CD to visit Rothamsted. The experimental plots are at their best "as illustrating the vast influence of external conditions on the character and results of the struggle between the numerous components of an established mixed herbage".

Author:  Joseph Henry Gilbert
Addressee:  Charles Robert Darwin
Date:  5 June 1881
Classmark:  DAR 165: 44
Letter no:  DCP-LETT-13196
Document type
letter (7)
Addressee
Correspondent
Darwin, C. R.[X]
Gilbert, J. H.[X]
Date
1881
02 (3)
03 (2)
06 (2)
letter